Feuerbach's theorem

the theorem that the nine-point circle of any triangle is tangent to the incircle and to the three excircles
Intangible theorem Q3527074

Facts

5 properties
Instance of
theorem
Maintained by WikiProject
WikiProject Mathematics[6]
Statement describes
triangle[5]
🏷️ Also known as
en Feuerbach's theorem de Satz von Feuerbach el θεώρημα Feuerbach el θεώρημα Φόιερμπαχ es teorema de Feuerbach fr théorème de Feuerbach it teorema di Feuerbach ja フォイエルバッハの定理 ko 포이어바흐의 정리 ko 포이어바흐 정리 pt feorema de Feuerbach ru теорема Фейербаха sv Feuerbachs sats tr Feuerbach teoremi
🔖 Identifiers · 3
Google Knowledge Graph ID
/g/120xpbfp
MathWorld ID
FeuerbachsTheorem

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Summary

Feuerbach's theorem is a theorem[1].

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APA 4ort.xyz Knowledge Graph. (2026). Feuerbach's theorem. Retrieved November 4, 2026, from https://4ort.xyz/entity/feuerbach-s-theorem
MLA “Feuerbach's theorem.” 4ort.xyz Knowledge Graph, 4ort.xyz, 4 Nov. 2026, https://4ort.xyz/entity/feuerbach-s-theorem.
BibTeX @misc{4ortxyz_feuerbach-s-theorem_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{Feuerbach's theorem}}, year = {2026}, url = {https://4ort.xyz/entity/feuerbach-s-theorem}, note = {Accessed: 2026-11-04}}
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